A boundary across the area triggered isolated severe thunderstorms during the afternoon and evening hours. Storm reports comprised of damaging thunderstorm winds.
Every event with a place to put it. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS MRX wrote it up.
A boundary across the area triggered isolated severe thunderstorms during the afternoon and evening hours. Storm reports comprised of damaging thunderstorm winds.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Morristown, TN wrote its last area forecast discussion before the first event at Jun 20, 1:35 PM EST, 5 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE MORRISTOWN TN 235 PM EDT SAT JUN 20 2009 .SHORT TERM...(TONIGHT AND SUNDAY)...WEAK COLD FRONT WILL SAG INTO THE AREA BEFORE BECOMING NEARLY STATIONARY LATER TONIGHT. SOME SCATTERED CONVECTION HAS FIRED AHEAD OF THE FRONT THIS AFTERNOON. WILL CARRY SLIGHT CHANCE POPS NORTH EARLY...AND ALL NIGHT CENTRAL. CHANCE POPS CENTRAL CLOSER TO WHERE EXPECT BOUNDARY TO BE...SLIGHT CHANCE ELSEWHERE FOR SUNDAY. MAV TEMPS GENERALLY LOOK TO BE IN THE BALLPARK...SO ONLY SOME MINOR TWEAKS. .LONG TERM...(SUNDAY NIGHT THROUGH SATURDAY)...MODELS AND ENSEMBLES REMAIN IN GENERAL AGREEMENT THROUGH THE LONG TERM WITH AMPLIFIED UPPER FLOW. SOUTHERN APPALACHIAN REGION WILL BE BETWEEN INTENSIFYING TROUGH OFF THE EASTERN SEABOARD AND RETREATING RIDGE OVER THE SOUTHERN PLAINS. THIS WILL RESULT IN NORTHWESTERLY FLOW ALOFT AND EVENTUALLY ALMOST NORTHERLY BEFORE UPPER FLOW DEAMPLIFIES LATE IN THE LONG TERM. DIFFUSE SURFACE BOUNDARY WILL CONTINUE TO LINGER IN OUR GENERAL AREA ESPECIALLY EARLY IN THE LONG-TERM PERIOD. COLLECTIVELY...THESE FEATURES WILL RESULT IN SOMEWHAT UNSETTLED WEATHER. HOWEVER...TIMING OF INDIVIDUAL WAVES TRANSLATING THROUGH THE NORTHERLY FLOW WILL BE NEARLY FUTILE. THUS HAVE NOT MADE ANY MAJOR CHANGES TO PRECEDING GRIDS/FORECAST. TEMPS SHOULD CONTINUE TO AVERAGE SOMEWHAT ABOVE CLIMO THROUGH THE PERIOD. && .PRELIMINARY POINT TEMPS/POPS... CHATTANOOGA AIRPORT, TN 72 96 72 91 71 / 10 20 20 30 20 KNOXVILLE MCGHEE TYSON AIRPORT, TN 72 90 70 88 68 / 20 30 20 30 20 OAK RIDGE, TN 72 91 69 89 68 / 20 30 20 40 10 TRI CITIES AIRPORT, TN 67 86 64 87 63 / 20 20 10 30 20 && .MRX WATCHES/WARNINGS/ADVISORIES... NC...NONE. TN...NONE. VA...NONE. && LDW/LCM
The Knoxville radar (KMRX), 116 km away, was scanning. The volume nearest the first event began at 18:39 UTC.
3 thunderstorm wind. Local standard time, as filed.
Law enforcement personnel reported several trees downed by thunderstorms northeast of Elizabethton.
Law enforcement personnel reported several trees downed by thunderstorm winds southeast of Jonesboro.
Law enforcement personnel reported four trees downed by thunderstorm winds in the Springdale area.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Tennessee in 2009Every state in 2009This day in weather historyWarnings in Tennessee, June 2009
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 174110, 174111, 174112.